WattCost

Data through April 2026

Running cost · Water Heaters (Electric) · ENERGY STAR certified

Ruud PROUH65 T2 RU400-SO

For a standard household draw pattern, the Ruud PROUH65 T2 RU400-SO uses a certified 1,184 kWh per year: roughly $223 annually at the national average rate. That's close to the middle of the certified pack — about 9% above the median electric water heater, ranked 316 of 566. Where you live moves the bill from $146 a year in North Dakota to $552 in Hawaii.

Estimated annual running cost · U.S. average rate 18.8¢/kWh

$223/yr

$121 · cheapest certified water heaters (electric)$328 · priciest
Per month
$18.58
Per day
61¢
Certified use
1,184 kWh/yr
Type
Hybrid/Electric Heat Pump
Heat pump type
240 Volt Integrated HPWH
Storage volume
59 gal
First-hour rating
75 gal
UEF
4.05
643 kWh1,741 kWh
Where the Ruud PROUH65 T2 RU400-SO (▮) sits among all 566 certified water heaters (electric), by annual kWh

What it costs in every state

Ruud PROUH65 T2 RU400-SO: 1,184 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama17.4¢$206
Alaska27.4¢$324
Arizona15.5¢$183
Arkansas14.2¢$168
California35.3¢$417
Colorado16.5¢$196
Connecticut32.2¢$382
Delaware18.8¢$222
District of Columbia25.4¢$301
Florida15.4¢$182
Georgia15.4¢$182
Hawaiipriciest46.6¢$552
Idaho12.7¢$150
Illinois20.5¢$242
Indiana17.9¢$212
Iowa13.9¢$164
Kansas15.8¢$187
Kentucky15.0¢$178
Louisiana14.4¢$171
Maine28.4¢$336
Maryland22.1¢$261
Massachusetts29.4¢$349
Michigan21.4¢$253
Minnesota16.4¢$194
Mississippi16.8¢$198
Missouri14.0¢$166
Montana13.9¢$165
Nebraska13.3¢$157
Nevada14.3¢$169
New Hampshire27.2¢$323
New Jersey23.5¢$279
New Mexico15.2¢$179
New York29.4¢$349
North Carolina16.3¢$192
North Dakotacheapest12.3¢$146
Ohio19.5¢$231
Oklahoma13.3¢$158
Oregon15.8¢$187
Pennsylvania21.5¢$254
Rhode Island28.3¢$335
South Carolina17.1¢$202
South Dakota14.5¢$172
Tennessee14.9¢$177
Texas17.0¢$201
Utah13.3¢$157
Vermont24.6¢$291
Virginia17.4¢$206
Washington14.4¢$170
West Virginia16.1¢$190
Wisconsin19.2¢$227
Wyoming14.7¢$174

Certified models closest in efficiency

electric water heaters within reach of 1,184 kWh/yr
ModelkWh/yr$/yr (US avg)
Friedrich PROH65 T2 FD400-301,184$223
Friedrich PROH65 T2 FD400-SO1,184$223
Rheem PROPH65 T2 RH375-301,184$223
Rheem PROPH65 T2 RH375-SO1,184$223
Rheem PROPH65 T2 RH400-301,184$223
Rheem PROPH65 T2 RH400-SO1,184$223

Run your own numbers

Your rate, your numbers

Per day
61¢
Per month
$18.58
Per year
$223

1,184 kWh/yr × 18.8¢/kWh = $223/yr

Prefilled with this model's certified 1,184 kWh/yr — adjust if your usage differs from the DOE test basis. The certified annual kWh comes from the DOE Uniform Energy Factor test, which simulates a typical household's daily hot-water draw pattern. Only electric models (including heat-pump units) are listed — gas models burn gas, not kWh.

Questions, answered with the data

How much electricity does the Ruud PROUH65 T2 RU400-SO use?
ENERGY STAR certifies the Ruud PROUH65 T2 RU400-SO at 1,184 kWh per year. The certified annual kWh comes from the DOE Uniform Energy Factor test, which simulates a typical household's daily hot-water draw pattern. Only electric models (including heat-pump units) are listed — gas models burn gas, not kWh.
How much does the Ruud PROUH65 T2 RU400-SO cost to run per month?
About $18.58 a month at the U.S. average residential rate (18.8¢/kWh) — 61¢ a day, or $223 a year. Your state's rate moves this up or down; see the table above.
Is the Ruud PROUH65 T2 RU400-SO energy efficient?
It uses 9% more electricity than the median certified electric water heater.
What does the Ruud PROUH65 T2 RU400-SO cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $146 a year in North Dakota (12.3¢/kWh) and $552 in Hawaii (46.6¢/kWh).

Keep digging